1	PubChem	http://pubchem.ncbi.nlm.nih.gov	http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=	
2	ChemSpider	http://www.chemspider.com	http://www.chemspider.com/Chemical-Structure.	.html
3	Wikipedia	http://www.wikipedia.org	http://en.wikipedia.org/wiki/	
4	DrugBank	http://www.drugbank.ca	http://www.drugbank.ca/drugs/	
5	MPOD	http://mpod.cimav.edu.mx	http://mpod.cimav.edu.mx/dataitem/	
6	AMCSD	http://rruff.geo.arizona.edu/AMS/amcsd.php	http://rruff.geo.arizona.edu/AMS/result.php?key=_database_code_amcsd+	&viewing=html
7	Wikidata	https://www.wikidata.org	https://www.wikidata.org/wiki/